1988140

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{1291}}^1$

素因数の和:1318

約数の個数: 48

約数和(自身を含む): 5209344

約数和(自身を除く): 3221204

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 20, 22, 28, 35, 44, 55, 70, 77, 110, 140, 154, 220, 308, 385, 770, 1291, 1540, 2582, 5164, 6455, 9037, 12910, 14201, 18074, 25820, 28402, 36148, 45185, 56804, 71005, 90370, 99407, 142010, 180740, 198814, 284020, 397628, 497035, 994070, 1988140]

約数ペア:

[(1, 1988140), (2, 994070), (4, 497035), (5, 397628), (7, 284020), (10, 198814), (11, 180740), (14, 142010), (20, 99407), (22, 90370), (28, 71005), (35, 56804), (44, 45185), (55, 36148), (70, 28402), (77, 25820), (110, 18074), (140, 14201), (154, 12910), (220, 9037), (308, 6455), (385, 5164), (770, 2582), (1291, 1540)]